this post was submitted on 16 Oct 2024
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What are some mind blowing Rust tricks? (programming.dev)
submitted 2 months ago* (last edited 2 months ago) by little_ferris@programming.dev to c/rust@programming.dev
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If we were to create a Rust version of this page for Haskell, what cool programming techniques would you add to it?

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[–] Ephera@lemmy.ml 2 points 2 months ago* (last edited 2 months ago)

Well, you would determine the TypeId of SomeOtherType, then search for that as the key in your HashMap and get back a None, because no entry exists and then you'd hand that back to the user.
I guess, my little usage example should've included handling of an Option value...

So, it's only a runtime error, if you decide to .unwrap() or similar.